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G. W. GALKINS &'J. W'ooDH-I'LL.

BLEVATOR BUGKET.

Patented Apr. 4, 1-882.

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UNITED STATES PATENTv OEEICE. y

GEORGE W. OALKINS AND JOHN WOODHILL, OF CLEVELAND, OHIO; SAID WOODHILLASSIGNOR TO SAID OALKINS.

ELEvAToR-BUCKET.

SPECIFICATION forming part of Letters Patent No. 256,100, dated April 4,1882.

Application filou october s, ists.

To all whom fit may concern Be it known that we, GEORGE W. UALKINs andJOHN WooDHtLL, of Cleveland, in the county of Quyahoga, State of Ohio,have invented certain new and useful Improvements in Hoisting-Buekets,which are fully described in the following; specification and theaccompanying drawings, in which- Figurel represents a derrick having oneof 1o ouriinprovedbucketssuspendedthereto. Fig. 2 is a vertical sectionof the bucket. Fig. 3 is a plan ot the bottom of the bucket.

Our invention relates to buckets used in handling and dumping coal,stone, and-other articles-as, for example, in loading and unloadingvessels; and the invention consists of a peculiarly-pivoted bucket andot its operating devices, as hereinafter fully described.

A designates the body ot' the bucket, made 2o usually of iron.

B is an angle-iron hoop, secured to the bottom edge ofthe bucket. Thebottom D of the bucket is made preferably of wood, because it islighter, cheaper, and lasts longer than iron, and in order that thelower end of the bucket may not be too heavy. This wooden bottom restson two iron cross-bars, C C, which are supported by the hoop B, 'asshown.

The bucket is pivoted within and to the 3o bail E by means of theprojecting' pins F, fixed to the body A at such points as that thecenter of gravity of the empty bucket will be below the pivots and thecenter of gravity of the loaded bucketwill be above the same pivots.

,3 5 G is a metallic piece fastened at the top to the outside of thebucket, and provided with a central notch, and tapered from the notchtoward each end, forminga catch for the springlatch H, adjusted in aslot or recess, l, in one 4o arm ot' the bail. The spring-latch isprovided at its upper endwith an eye for attaching to it a cord, J, forreleasing the bucket from the latch, which is ,adjusted to bear againstthe catch G and automatically spring into its notch when the bucketreturns to the upright position. The upper part of the bail is adaptedto be suspended to any derrick or craneA for hoistingand conveying thebucket to theplaees for charging and discharging it.

5o It will be observed that the automatic dumping ot' the bucket and itsreturn to an upright position'depend upon and are secured by thevertical adjustment ot' the pivots above and -below the centers ofgravity of the empty and loaded bucket, as described, and that thereforevthe pivots' may be located onthe vertical centerline ot' the bucket,thus allowing the use of an entirely round bucket, which is cheaper andmore readily made than the usual form of an oblong or angular bucket,and also alloW- 6o ing the bucket to be dumped and emptied as readily atone side as at the other, thus facilitating the accurate discharge ot'its contents at the precise place required; and a bucket thusconstructed, adjusted, and pivoted will automatically assume andmaintain, while empty,

an upright position without the use of stops or other appliancesordinarily employed in hoisting-buckets.

These features of construction and adjust- 7o ment we consider essentialto the rapid and accurate manipulation of the bucket in charging as wellas discharging it.

The empty bucket, being in the upright position shown in Fig. l of thedrawings, where it is securely held by the spring-latch, is filled andconveyed to the place of deposit, when the spring-latch H is drawn outot' the notch ot" the catch G by the rope J, and the center of gravitybeing above the pivots, the bucket` Ec automatically dumps and emptiesitself, and when emptied, the center of gravit-y being below the pivots,the bucket automatically returns to the upright position, the latchautomatically springing into the notch ofthe catch and fastening thebucket in the position for reloading.

It will be readily seen that the point of location, vertically, of thepivots depends somewhat upon the comparative weight of the lower 9o andupper ends of the bucket. That precise point is ascertained by anysuitable devices after the bucket is made, it being essential to theeasy, rapid, and proper operation' of the bucket that the pivots belocated so that when the bucket is empty there will be just enough ofpreponderance of weight below the pivots to carry the bucket to theupright position with suicient forc'e only to move backward the latchand allow it to spring into the notch of the roo catch.

It is evident that if the pivots should be placed too low the bucketwould not automatically return to the upright position, and if thepivots should be placed too high, the empty bucket would return with toogreat force, and the. loaded bucket would not so readily, if at all,dump and completely empty itself.

What We claim as new, and desire to secure by Letters Patent, is

1. A hoistingbucket suspended upon pivots located so as to be above thecenter of gravity of the empty bucket and below the center of gravity ofthe loaded bucket, whereby the loaded bucket, when released from itslatching devices, will aautomatically dump and empty itselfat eitherside, and when emptied the bucket will automatically return to and latchitself in an upright position, substantially as and for the purposesdescribed.

2. The combination of a pivoted bucket having a notched catch with abail provided with zo a recess or slot, and having a spring-latcharranged in the recess or slot, the devices and combination operating inthe manuerdescribed, whereby rapid charging and discharging of thebucket is accomplished, substantially as set 25 forth.

G. W. GALKINS. JOHN WOODHILL.

Witnesses:

F. W. CADWELL, SAMUEL OsTERuoLD.

